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Imantodes cenchoa
''Imantodes cenchoa'' (common names: blunthead tree snake,〔 fiddle-string snake, mapepire corde violon) is a species of rear-fanged colubrid snake distributed in Mexico, Central America, and South America.
==Description==
Blunthead tree snakes average about . Maximum length is about .〔
These snakes are known for their long, slender bodies and very large heads. Their pupils are very distinct from other snakes. Most snakes found around the world are known to have very poor vision and rely mostly on their smell and vibrations to detect signs of prey and predators. Arboreal snakes have much better vision among other classes of snakes. Blunthead tree snakes on the other hand, have vertical slits for pupils which allow for the snake to look down. This trait is what give the blunthead tree snake such an advantage over other snakes. Their eyes make up approximately 26% of its head.
The ventral surface, or stomach, of the snake is mostly white while the dorsal surface, or top, is a light or pale brown with lateral dark brown patches that begin at the head and continue down the length of the snakes’ body. The northern and southern populations of blunthead tree snakes exhibit different sexual dimorphism, the existence of two different traits of a species in the same population. For examples, northern males have a slightly longer tail whereas the southern populations have a smaller tail. In some regions females typically have a much larger head than the males.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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